diff --git a/source/logic/conf.py b/source/logic/conf.py
index 19e407b..bd38314 100644
--- a/source/logic/conf.py
+++ b/source/logic/conf.py
@@ -227,9 +227,9 @@ def conf_normalize_schedule(
 		node
 	)
 	return {
-		"regular_interval": conf_normalize_interval(node["regular_interval"]),
-		"attentive_interval": conf_normalize_interval(node["attentive_interval"]),
-		"reminding_interval": conf_normalize_interval(node["reminding_interval"]),
+		"regular_interval": conf_normalize_interval(node_["regular_interval"]),
+		"attentive_interval": conf_normalize_interval(node_["attentive_interval"]),
+		"reminding_interval": conf_normalize_interval(node_["reminding_interval"]),
 	}
 	
 
diff --git a/source/logic/main.py b/source/logic/main.py
index 4e08bc8..a6a7a44 100644
--- a/source/logic/main.py
+++ b/source/logic/main.py
@@ -12,7 +12,11 @@ def state_decode(state_encoded):
 		"timestamp": state_encoded["timestamp"],
 		"condition": condition_decode(state_encoded["condition"]),
 		"count": state_encoded["count"],
-		"last_notification_timestamp": state_encoded["last_notification_timestamp"],
+		"last_notification_timestamp": (
+			state_encoded["last_notification_timestamp"]
+			if ("last_notification_timestamp" in state_encoded) else
+			None
+		),
 	}